The Netherlands, which has a per capita income of $41,447, saw its stockpile of gold decline 477.7 metric tonnes.

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Image: Customers pick their food in the 'restaurant of the future' at the Dutch University of Wageningen, eastern Netherlands. The university has opened a 'big brother' restaurant where academics and companies can study consumer behaviour by tracking diners on cameras to test their reactions to food products, packaging and restaurant design.Photographs: Jerry Lampen/Reuters

France, which has a per capita income of $35,680, saw its stockpile of gold decline 110.5 metric tonnes.

Image: A single woman pushes a bachelor who rides in a shopping trolley at the 'adopt-a-guy' store in Paris, France. The boutique opened its doors promising a high-end shopping experience for women searching for Mr Right.Photographs: Jacky Naegelen/Reuters